Sectional furnace



Feb. 28,1928. 'l 1,660,786

H. cowLEs ET m.

SECTIGNAL FURNACE Filed Jan. 11. 1923 www "nm/L 1T" u i Patented ret. as, laas.

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HENRY COVLS AND JAMES MORRIS, 0F ETICA., ASSGNORS TO UTIC'Ay HEATER COIMIPANY, 0F WHITESTOWN, NEWYORK, ACORPORATION OF NEW YORKf` SECTIQNAL FURNACE;

Application 'filed January 11, 1933. Serial No."6 12,`005.

Our invention relates to a sectional fur` nace made up of an assembled series of hollow water-containing sectionsforming a fire boxl and flue space and including novel means for introducing auxiliary air tothe. fire box near the front of the furnace to.

promote completeness of combustion and prevent or minimize smoke, and to the structure of the front section or scctionswhereby the results'stated are accomplished.

Referring to the drawings: Figure 1 is aside elevation of a sectional furnaceY embodying our invention, parts of the side l walls of the sections being broken away to 15 show the internal construction in section.

Figure 2 is an elevationof the front section and of the second'section, parts of the front wall of the front section being broken away to show the structure in rearl thereof partly in elevation and partly in section, and part of the front wall of the second section being broken away to show internal construction in section.

Figure 3 is the section on the line 3-.3 of Figure 2 looking inthe direction of the arrows.

Figure 4 is a. perspective of the aperturedv channel bar, which constitutes one ofthe walls of the auxiliary air delivery passage, and l f Figure 5 is a detail side elevation showing the inlet of the auxiliary air delivery passage with its adjustable damper.

The furnace in which our invention is illustrated as embodied is made up of a series offhollow water-containing sections 1 bolted together in the customary way and suitably supported as by the base members 2 at each side thereof, these members with transverse rear plate 3 and front plate 4 enclosing space beneath the sections, part of which divided off by the plate 5,'forms the ash pit. The front plate 4 has the usual door and damper arrangements which need not be particularized. By their aligned openings sections toward the front of the furnace provide the irebox 6, intermediate sections combustion and flue space 7 communicating therewith, and rear sections flue space 7 and means of Vcommunication with the overhead side return flues 8, both of which deliver to escape Hue 9. None of these sections requires special consideration which in the furnace illustrated, contains the n ovel features-which characterize this section itself and vco-operate with otherfurnace` elements. The section 1a is provided with an lopening 1 0 constituting the fuel entrance to the lirebox and closed by the feed door 11.v 60. It is also provided with clean out openingsand doors 12, said openings being separated bya vertical' water-containing partition 13. The doors 12 each cover the end of thefcorrespondingside flue 8 andpart of the com- 65- mon escape flue 9 thereby giving accessto all parts ofA 'both the side flues and the escape flue. Introduction of auxiliary air near the front of the firebox, and particularly near the upper part of it, `ascontem- 70. plated herein, hasthe advantage of giving increased opportunity for combustion during the passage of the air along with the fire gases throughftheentire lengthof the fire-l 'boxvso that its utilization -for purposes of 75 combustion due' tothe longer travel is the more complete. It is further desirable thatv the auxiliary air passage bywhich air is conveyed to the firebox and delivered therein should be formed in` one ofthe sections 30 adjacent the front ofthe furnace and pref-kk erably in the front section itself,faltl1ough a construction in which itv is Aformed part in one section and part in the adjacent sccti-on will produce substantially `equivalent i results. The air delivery passage 14 is best cast therefore, as an open-sidedhorizontal groove in the rear face of the 'front section f 1a above the feed door. As thus formed its walls are watercooled on three-sides. Its 90 open side, which faces toward the rear of the furnace is covered by a removable member 15 which most conveniently takes Vthev form of an langle bar having air outlet openings 16. This bar is preferably suspended 95 by its upper flange 17 from the shoulder 18 extending across the rear side of the front section below -ue space, where such shoulder forms a support receivingsaid flange.

Suitable inlet tliimbles or bushings 19 are 10o located in openingsl cast in the side walls of the front unit, extending through the water space andcommunicating with the ends 0f the air delivery passage 14. rfhese bushings are provided withv dampers 20 whereby the 105 auxiliary air supply is controlled. By the l y construction described, theauxiliary airdelivery passageV is adequately protected and the air passing through it is thereby heated sufficiently so that it cantalre its intended www. t i

i part in perfecting combustion in the iirebox.

In view` of the Vfact 'above referred to, that air entering near the front of the fireboX is in contact,for a longer time, with the burning gases, its heat onv admission `need not be so great as where delivered further toward the rear of the firebox. It will be i noted also that advantage is taken of the usual configuration of front units in sectional furnaces, wherein there is a furnace opening,

and,above the saine, Hue openings with an.`

intermediate transverse, hollow water-cooled portion between, by locating the air delivery iassage in the said intermediate transverse water-cooled portion. This requires the least possible departure from usual construction and merely involves casting a recess in the back face of the intermediate member of the front seetion. The rear wallof the passage thus formed is maintained inposition without the necessity of special fastenings, and since there is sufficient room between opposed parts of the first two sections,

Vand flue space, and rear sections forming flue space, the various sections being provided With overhead lues in communication with the flue space, and a transverse watercooled passage cast in the body of the front section between the feed door opening and the overhead flue space and'through which lin the usual operation of the furnace auxiliary air is delivered in the firebox.

, 2. A sectional furnace made up ofV an assembled series of cast hollow water-containing sections, having` aligned openings forming a fireboX and flue spaces in connection, therewith.r the front Section being provided with the usual furnace opening and feed door and having in its body a cast channel facing rearwardly and having' its walls water-cooled, and a channel bai closing its rear open side and provided with a seriesV of openings through which auxiliary air is delivered, rearward into the fireboX.

3. In Ya sectional furnace, a cast hollow water-containing frontsection having feedr and clean vont openings and doors therefor and having walls enclosing respectively firebox space in the lower part of the section and Hue space in the upper part andvpro` viding between said spaces a transverse member in which isV cast a three channel structure extending lengthwise of the transverse member and comprising a pair of spaced water channels facing the front of the furnace and an open-sided air channel facing the rear of the'furn'ace interposed between the water channels.' I

In testimony whereof, we have signed this specification. l f HENRY COVVLES.

JAMES K. NORRIS, v 

